Pregnant Rat And Shark Flashcards
1
Q
How does a developing shark embryo receive nutrients?
A
Nutrients can be passed from mother to embryo by moving directly through the tissues, and the embryo can take up nutrients through the yolk sac. The uterine lining of the shark can secrete these nutrients to the embryo as well.
2
Q
How does a developing rat embryo receive nutrients?
A
The yolk sac (similar to the shark) acts as a transient placenta and can absorb nutrients and directly pass them to the developing pup
